/*
 * Copyright (c) 2012-2018 Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Red Hat, Inc. - initial API and implementation
 */
package org.eclipse.che.api.core.jsonrpc.commons.reception;

import static com.google.common.base.Preconditions.checkNotNull;
import static org.slf4j.LoggerFactory.getLogger;

import java.util.function.BiConsumer;
import java.util.function.Consumer;
import org.eclipse.che.api.core.jsonrpc.commons.RequestHandlerManager;
import org.slf4j.Logger;

/**
 * Operation configurator to define an operation to be applied when we handle incoming JSON RPC
 * notification with params object that is represented by a single object. As it is an operation
 * there is no result.
 *
 * @param <P> type of params object
 */
public class ConsumerConfiguratorOneToNone<P> {
  private static final Logger LOGGER = getLogger(ConsumerConfiguratorOneToNone.class);

  private final RequestHandlerManager handlerManager;

  private final String method;
  private final Class<P> pClass;

  ConsumerConfiguratorOneToNone(
      RequestHandlerManager handlerManager, String method, Class<P> pClass) {
    this.handlerManager = handlerManager;

    this.method = method;
    this.pClass = pClass;
  }

  public void withBiConsumer(BiConsumer<String, P> biConsumer) {
    checkNotNull(biConsumer, "Notification consumer must not be null");

    LOGGER.debug(
        "Configuring incoming request binary: "
            + "consumer for method: "
            + method
            + ", "
            + "params object class: "
            + pClass);

    handlerManager.registerOneToNone(method, pClass, biConsumer);
  }

  public void withConsumer(Consumer<P> consumer) {
    withBiConsumer((endpointId, pValue) -> consumer.accept(pValue));
  }
}
